For industrial process control instruments, analog 4–20mA current loops are commonly used for analog signaling, with 4mA representing the lowest end of the range and 20mA the highest. The key advantages of the current loop are that the accuracy of the signal is not affected by voltage drop in the interconnecting wiring, and that the loop can supply operating power to the device. Even if there is significant electrical resistance in the line, the current loop transmitter will maintain the proper current, up to its maximum voltage capability. Continue reading Arduino 4-20mAmp Current Loop Measurement
Tag Archives: sensor
Knock Detection Sensor Arduino
Knock Detection
Here we use a Piezo element to detect sound, what will allow us to use it as a knock sensor. We are taking advantage of the processors capability to read analog signals through its ADC – analog to digital converter. These converters read a voltage value and transform it into a value encoded digitally. In the case of the Arduino boards, we transform the voltage into a value in the range 0..1024. 0 represents 0volts, while 1024 represents 5volts at the input of one of the six analog pins. Continue reading Knock Detection Sensor Arduino
Distance Measurement using Ultrasonic Sensor HC-SR04 and Arduino
The HC-SR04 Ultrasonic Sensor is a very affordable proximity/distance sensor that has been used mainly for object avoidance in various robotics projects. It essentially gives your Arduino eyes / special awareness and can prevent your robot from crashing or falling off a table. It has also been used in blind stick applications, water level sensing, and even as a parking sensor. Continue reading Distance Measurement using Ultrasonic Sensor HC-SR04 and Arduino
Water flow measurement with Arduino
The flow sensor used here works on the principle of “Hall Effect”. According to which, a voltage difference is induced in a conductor transverse to the electric current and the magnetic field perpendicular to it. Here, Hall Effect is utilized in the flow meter using a small fan/propeller shaped rotor which is placed in the path of the liquid flowing. Continue reading Water flow measurement with Arduino
pH Measurement with Arduino
This tutorial will guide you How to measure water quality and other parameters ? and How to use with Arduino? In this tutorial we use analog pH meter sensor, specially designed for Arduino controllers and has built-in simple, convenient and practical connection and features. It has an LED which works as the Power Indicator, a BNC connector and PH2.0 sensor interface. To use it, just connect the pH sensor with BNC connector, and plug the PH2.0 interface into the analog input port of any Arduino controller.
Attention: In order to ensure the accuracy of the pH probe, you need to use the standard solution to calibrate it regularly. These standard calibration solutions come with this pH sensor. Generally, the period is about half a year. If you measure the dirty aqueous solution, you need to increase the frequency of calibration. Continue reading pH Measurement with Arduino